Title:
COMPOSITE PIEZO-ELECTRIC BODY
Document Type and Number:
Japanese Patent JPH03270282
Kind Code:
A
Abstract:
PURPOSE:To lower the side lobe level so as to improve the resolution of ultrasonic image by coupling piezo-electric elements of two or more kinds having different frequency constants one another with an organic polymeric material after arranging the elements in lines. CONSTITUTION:Piezo-electric elements 12a and 12b having different frequency constants are one-dimensionally coupled one another by alternately arranging the elements 12a and 12b in a two-dimensional plane and providing electrodes 14 and 15 to both end faces of the coupled elements and three-dimensionally coupled one another by filling the gap between each element 12 with an organic polymeric material 13. When the elements 12a and 12b vibrate in one body as a composite piezo-electric body 11, the body vibrates at frequencies containing both frequencies and weighting can be performed with the one composite piezo-electric body 11 by adjusting the intensity of the amplitude of an ultrasonic beam. Therefore, an ultrasonic beam pattern which is lowered in side lobe level can be formed.
Inventors:
SAITO TAKAYOSHI
KOISHIHARA YASUSHI
SHINODA FUMIKA
KOISHIHARA YASUSHI
SHINODA FUMIKA
Application Number:
JP7108390A
Publication Date:
December 02, 1991
Filing Date:
March 20, 1990
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
G01N29/24; A61B8/14; H01L41/08; H01L41/193; H04R1/22; H04R17/00; (IPC1-7): A61B8/14; G01N29/24; H01L41/08; H01L41/193; H04R1/22; H04R17/00
Domestic Patent References:
| JPS61283181A | 1986-12-13 | |||
| JPS63168061A | 1988-07-12 |
Attorney, Agent or Firm:
Masahiro Kurai
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